import * as Backend from 'automerge/backend'

let doc = Backend.init()

loadChangesFromDisk().then(onRemoteChanges)

function onLocalChange(change) {
  const [newDoc, patch] = Backend.applyLocalChange(doc, change)
  doc = newDoc
  saveChangeToDisk(change)
  sendToFrontend(patch)
}

function onRemoteChanges(changes) {
  const [newDoc, patch] = Backend.applyChanges(doc, changes)
  doc = newDoc
  sendToFrontend(patch)
}